View Single Post
Old 25 April 2015, 05:16   #56
Join Date: Jan 2010
Location: Kansas
Posts: 1,284
Originally Posted by JimDrew View Post
You keep forgetting that a real Mac does not run at all with an 060. FUSION works with the 060 after patching the crap out of the OS and disabling superscaler, and some applications also need the instruction cache off or they will crash. So, the 060 is severely crippled, and thus it should not be surprising that it is a lot slower than 33MHz 040 setup... but hey, what would I know.
I understand that the 68060 needs some patching to run MacOS but the ShapeShifter video above shows that the 68060 can outperform the 68040 while being stable. Fusion is not as stable as ShapeShifter on the 68060 but it also works. The AmigaOS needs some patching for the 68060 but it is worthwhile and stable. The 68060 daughter board could be available before any FPGA 68k CPU+FPU and an FPGA implementation would likely have bugs making it less stable than a patched 68060 MacOS. The only other possibility near term would be to have a different voltage regulator for the FPGA arcade daughter board to run a 68040 but most people would still choose a 68060 because it is faster for the Amiga and produces much less heat.

Originally Posted by JimDrew View Post
People have seen what the Apollo core does on a smaller FPGA with a slower memory interface. You would be rather foolish to be believe that substantially better performance on the Replay is far off.
The Apollo/Phoenix CPU core has a deeper pipeline, a more parallel advanced design and is highly optimized for the FPGA it is in. The TG68 would need major changes to achieve 68060@50MHz performance. A more advanced design with FPU and MMU may not fit with a chipset. Realistically, this level of performance is unlikely for years while the 68060 daughter board could be out in 6 months or less.
matthey is offline  
Page generated in 0.04140 seconds with 10 queries